Crowcon FGard IR3 Flame Detector User manual

Brand: Crowcon

Model: FGard IR3 Flame Detector

Type: User manual

Crowcon FGard IR3

Installation, Operating and Maintenance Instructions

Flame detector IR3 (FGard IR3) – FD-AC-07

Issue 1: February 21

IR3 Flame Detector

Contents

1 Introduction ................................................................................................................................................................................. 5

1.1 Detector Features ............................................................................................................................................................ 5

2 Safety Instructions ..................................................................................................................................................................... 6

2.1 Specific conditions of use .............................................................................................................................................. 6

2.2 Cautions .............................................................................................................................................................................. 6

2.3 Important Safety Notices ................................................................................................................................................ 6

2.4 EN 54-part 10 Limitation of use ................................................................................................................................... 8

3 Installation .................................................................................................................................................................................... 8

3.1 Detector Enclosure .......................................................................................................................................................... 8

3.2 Mounting & Orientation .................................................................................................................................................. 8

3.3 Wiring Procedure ........................................................................................................................................................... 10

3.4 0-20mA Output ............................................................................................................................................................... 11

3.5 Relay Output .................................................................................................................................................................... 12

3.6 Internal Inter-connections ............................................................................................................................................ 13

3.7 Installation Checklist ...................................................................................................................................................... 14

3.7.1 Mechanical ............................................................................................................................................................. 14

3.7.2 Electrical .................................................................................................................................................................. 14

4 System Design Guidelines ..................................................................................................................................................... 15

4.1 Power Supply................................................................................................................................................................... 15

4.2 Cable Selection ............................................................................................................................................................... 15

4.3 DC Power ......................................................................................................................................................................... 15

5 Application Guidelines ............................................................................................................................................................ 16

5.1 Positioning Requirements ............................................................................................................................................ 16

5.2 Detection Coverage ....................................................................................................................................................... 17

5.3 Exposure to Flare Radiation ......................................................................................................................................... 17

5.4 Optical Contamination ................................................................................................................................................... 17

5.5 Enclosed Areas ............................................................................................................................................................... 17

5.6 Detector Sensitivity ........................................................................................................................................................ 17

5.7 Detector Alarm Delay .................................................................................................................................................... 17

6 Maintenance and Commissioning ....................................................................................................................................... 19

6.1 Procedure ......................................................................................................................................................................... 19

6.2 Functional Testing .......................................................................................................................................................... 21

7 Fault Finding .............................................................................................................................................................................. 22

7.1 Removal of the Electronics........................................................................................................................................... 22

7.2 Replacement of the Electronics .................................................................................................................................. 22

7.3 Diagnostics ...................................................................................................................................................................... 22

7.4 LED Indication ................................................................................................................................................................. 23

7.5 Power Fault ...................................................................................................................................................................... 24

8 Technical Specification ........................................................................................................................................................... 25

8.1 Detector Information ..................................................................................................................................................... 25

8.2 Electrical Specification .................................................................................................................................................. 25

8.3 Mechanical Specification ............................................................................................................................................. 25

8.4 Environmental Specification ......................................................................................................................................... 25

8.5 Certification and Approvals ......................................................................................................................................... 26

8.6 Operating Specification ................................................................................................................................................ 26

8.7 FGard IR3 Detector Ordering Information ............................................................................................................... 27

8.8 Detector Accessories and Spares ............................................................................................................................. 27

9 Appendix A - Acronyms, Terms & Abbreviations ........................................................................................................... 28

10 Appendix B - Help us to help you. ................................................................................................................................. 29

11 Appendix C - Field of View ............................................................................................................................................... 30

12 Appendix D - FM Approval Performance Report ....................................................................................................... 31

13 Appendix E – Marine Certification. ................................................................................................................................. 33

14 Appendix F - IEC 61508 Failure Rate Data .................................................................................................................. 34

1 Introduction

This safety and technical manual applies to the Crowcon IR3 Flame Detector (FGard IR3) hardware version 1.0

and above.

The Crowcon FGard IR3 is a (triple) IR flame detector. It uses three IR sensors, digital signal processing

hardware and firmware algorithms to interpret the radiant characteristics of flame.

FM Approvals ensures that our flame detection firmware and hardware is fit for purpose through rigorous

research and testing to a range of fire types and various potential false alarm stimuli. This testing proves that the

FGard IR3 has an unsurpassed false alarm immunity.

The FGard IR3 has been designed for use in standalone operation.

1.1 Detector Features

• The FGard IR3 has a 90° cone of vision with a range of 60 metres to a 0.1m

pan fire of n-heptane.

• Three detection sensitivity settings allowing the user to select the sensitivity that is most suitable for their

application.

• Superior false alarm immunity to common sources of unwanted alarms such as hot process and hot

work.

• Advanced optical verification test assuring readiness to perform when needed.

• Outputs include both relay contacts and 0-20mA.

• Separate termination chamber for ease of installation.

• Certified Flame Simulator FGard SIM verifies operation from distances of 3 to 8 metres.

• FGard IR3 can operate via a standard 3 or 4 wire termination.

• Microprocessor controlled heated optics increases resistance to moisture and ice.

2 Safety Instructions

For the correct and effective use of this equipment, to maintain safety and avoid hazards it is essential that you

read and understand these instructions fully and act accordingly BEFORE installing, operating, or maintaining the

equipment.

PAY ATTENTION TO ALL SAFETY WARNINGS AND CAUTIONS

2.1 Specific conditions of use

This equipment is certified and intended for use in potentially hazardous areas. Install and use the equipment in

accordance with the latest regulations. The end user shall close any unused entries using suitably certified

blanking elements to maintain the housing’s type of protection.

For European (ATEX) installations IEC/EN60079-14 ‘Electrical Installations in Hazardous Areas’ and

ICE/EN60079-17 ‘Inspection and Maintenance in Hazardous Areas’ should be strictly observed. The IR3 type

flame detector; Crowcon FGard IR3, is to be installed in places where there is a low risk of mechanical damage.

For installations in North America the National Electrical Code (NEC) should be strictly observed. In other

countries the appropriate local or national regulations should be observed.

The equipment must be properly earthed to protect against electrical shock and minimise electrical interference.

Do not drill holes in any housing or enclosure as this will invalidate the explosion protection. Ensure that the

enclosure lid is fully tightened and locked into position before energising the equipment.

Do not open the enclosure in the presence of an explosive atmosphere.

All permits and proper site procedure and practices must be followed, and the equipment must be isolated from

the power supply before opening the enclosure in the field.

Operators must be properly trained and aware of what actions to take in the event of a fire being detected.

Cable to be used for installation is to be selected with a temperature rating of greater than 25 degrees Celsius

above the maximum ambient temperature. The metric cable entries are fitted with an internal stop. This will result

in threads of the cable gland being visible. Do not over tighten.

2.2 Cautions

Use only approved parts and accessories with this equipment.

Do not attempt to replace the window as the sapphire and the front cover are individually matched pairs to meet

the stringent requirement of the hazardous area certification.

The threaded portions of the detector are flame paths. These threads and the flame paths are not to be repaired.

To maintain safety standards, commissioning and regular maintenance should be performed by a qualified

person.

2.3 Important Safety Notices

Pay attention to the guidelines given throughout this document.

If in any doubt about the instructions listed within this manual, then please contact Crowcon. Crowcon takes no

responsibility for installation and/or use of its equipment if it is not in accordance with the appropriate issue

and/or amendment of the manual. Crowcon reserve the right to change or revise the information contained

herein without notice and without obligation to notify any person or organisation of such action.

Only those parameters and configurations highlighted with the FM diamond ( ) have been tested and

approved by Factory Mutual.

Warning

Do not open the detector assembly in a hazardous area. The detector contains limited serviceable components

and should only be opened by trained personnel.

Caution

The wiring procedures in this manual are intended to ensure functionality of the device under normal conditions.

Due to the many variations in wiring codes and regulations, total compliance to these ordinances cannot be

guaranteed. Be certain that all wiring complies with all local ordinances. If in doubt, consult the authority having

jurisdiction before wiring the system. Installation must be done by trained personnel.

Caution

To prevent unwanted actuation or alarm, extinguishing devices must be inhibited/isolated prior to performance

testing or maintenance.

Detector Orientation

Detectors should be mounted with the earth stud directly below the lens.

Detector Positioning

Detectors should be positioned to provide the best unobstructed view of the area to be protected.

The following factors should also be taken into consideration:

Identify all high-risk fire ignition sources. Ensure that enough detectors are used to adequately cover the

hazardous area.

Locate and position the detector so that the fire hazard(s) are within both the field of view and detection range

of the device.

For best performance, the detector should be mounted on a rigid surface in a low vibration area.

Extremely dense fog or blizzard conditions could eventually block the vision of the detector.

For indoor applications, if dense smoke is expected to accumulate at the onset of a fire, mount the detector on a

side wall (approximately 1 to 2 metres) below the ceiling.

The FGard IR3 has three sensitivity settings, which may be changed via a Crowcon application.

The flame detector carries out continuous internal hardware diagnostic testing to ensure correct operation is

relayed to the control system.

The FGard IR3 is not designed to annunciate diagnostic failure of signal returns via external wiring. Control

systems and fire panels generally have fault monitoring for such an eventuality.

2.4 EN 54-part 10 Limitation of use

The FGard IR3 is not approved for use in oxygen-enriched atmospheres.

As the FGard IR3 responds to flame, it cannot be used in locations where flare stacks are within its field of view

or a reflected view is present without triggering alarms.

As the FGard IR3 responds to CO

emissions of a flame the FGard IR3 cannot detect non-hydrocarbon fires,

such as those using pure hydrogen, silane, and sulphur as fuel.

The sensitivity of the FGard IR3 is reduced by obscurants such as smoke, fog, and other airborne particulates.

The FGard IR3 may be blinded by extremely dense obscurants.

Arc welding should not take place within 10m of the FGard IR3 when using the highest sensitivity setting.

3 Installation

The FGard IR3 design has been developed to allow simple installation. The detector comprises two key

components, the detector enclosure, and the detector internal assembly. The detector assembly located in the

front of the enclosure should not be removed except by trained personnel. Unauthorised removal or disassembly

of the detector assembly will invalidate the warranty. Only the rear end cap can be removed for terminal access.

3.1 Detector Enclosure

The detector electronics are housed in an enclosure certified for use in hazardous areas. For the exact

certification and conditions of use see certification label on the device, or the example drawing below:

The enclosure comprises the front window cover including the window part number 3303.8004, the rear

enclosure cover part number 2301.6009, the enclosure body part number 2301.6007, certification rating label

(see above) part number 3303.6008.04, and the mounting bracket Part Number 2301.6012.

3.2 Mounting & Orientation

The mounting bracket allows the detector’s vertical orientation to be adjusted from 0 to 45° and allows a

horizontal rotation of +/-45° when mounted from above.

Figure 1: Detector Mounting Bracket

Figure 2: Ceiling Mount

Figure 3: Wall Mount

Firm, vibration free mountings are essential for trouble free operation of optical systems and the detector should

be fixed to a rigid mounting. When mounting on a wall in this orientation allow for the cable gland and cable as

this may restrict the downward rotation of the detector.

3.3 Wiring Procedure

The wiring terminals are in the rear section of the detector enclosure and are accessible by removal of the end

cap.

The front section of the enclosure should only be accessed by trained personnel.

The terminal schematic detailed below shows the view looking inside the detector following removal of the end

cap.

Figure 4: Terminal Schematic

The detector has two types of alarm output available simultaneously.

• 0-20mA (source non-isolated)

• Relay (Alarm & Fault)

Listed below are wiring options dependent on the functional requirements of the detector.

3.4 0-20mA Output

The following wiring connection diagram shows correct wiring of the detector when a 0-20mA output is

required.

Figure 5: 3 Wire Termination

Factory Fixed Values

Current Output

Event

0mA

Power/Detector Fault

1mA

Low Supply Voltage Fault

1.5mA

Optical Fault

4mA

Healthy

18mA

Alarm

21mA

Over-range

Notes:

Note 1 - The tolerance on the above outputs is +/- 0.3mA current with a maximum loop resistance of 500

ohms.

Note 2 – Additional 0-20mA values are configurable and must be specified when ordering if required. The

optical fault signal may be configured at 2mA as opposed to 1.5mA and the alarm signal may be increased to

20mA.

Note 3 - The FGard IR3 can be factory-configured with an Aux alarm delay (20mA) of between 0 and 10

seconds in 1 second steps over and above the normal response times of the 18mA alarm signal. If the Aux

alarm signal is delayed, the 18mA alarm signal will precede the 20mA signal giving the normal response times

as tested by Factory Mutual to FM3260. If the 20mA alarm signal is delayed, it is considered an Aux alarm

level.

Note 4 – The 0-20mA signal has HART ® 7 protocol superimposed on top of it to give access to more

diagnostic information. See HART ® 7 Technical Note.

3.5 Relay Output

The following wiring connection diagrams shows wiring the detector when a relay output is required. Reversal of

polarity across terminals 1 & 2 enables Crowcon RS485 communication on terminals 3 & 4. This communication

protocol when used with Crowcon applications allows configuration changes to the detector.

Figure 6: Relay Configuration Termination

NOTE: EOL and alarm resistors values are defined by the client and the control system/fire

panel which the detectors are being integrated into.

3.6 Internal Inter-connections

The following diagram shows the internal inter-connections of the alarm and fault relay contacts and jumpers.

Each field connection is listed on this diagram for clarity.

Figure 7: FGard IR3 Internal Inter-connections

FGard IR3

3.7 Installation Checklist

Experience has shown that poor installation and commissioning practice may result in an unreliable fire detection

system that fails to meet the site performance targets. Before installing the detector, it is important to consider

where it is to be located and how it is to be mounted. To maintain compliance with the EMC regulations it is

essential the electrical installation be engineered correctly.

3.7.1 Mechanical

Notes

When locating the detector consideration should be given to maintenance access to the

detector. The detector mounting should be secure and vibration free.

It is advisable to check the detection locations, prior to fabrication of the mounting supports, as

changes are frequently made during construction at site which can affect detector coverage.

The installation should allow space for subsequent detector removal, for maintenance or repair,

to be easily achieved.

The detector should be fixed to a stable supporting structure using the mounting bracket

provided. The supporting structure must allow for horizontal adjustment of the detector

orientation. The support structure should be in place prior to detector installation. Information on

mounting is available from Crowcon.

The threaded flame path of the enclosure cover and body must be protected from damage

during installation. Any such damage can destroy the validity of the enclosure.

The detector electronics shall be protected from mechanical damage and external sources of

EMI such as X-rays, RFI and electrostatic discharge. The detector should not face directly

towards the sun.

Fit the mounting bracket to the support structure using 8mm bolts (not provided). The detector

(bracket) should be oriented to provide the desired coverage.

The detector enclosure body should be fitted to the mounting bracket. The bolts locate into the

bracket. Twist the enclosure to locate the bolts; these are then tightened using a 6mm Allen key.

Ensure the detector is orientated such that the earthing stud is directly beneath the lens.

Glanding should be carried out by trained personnel. The gland should be fitted in line with

installation standards for potentially explosive atmospheres that is 5 full threads minimum with

the IP seal washer fitted at the bottom of the thread. This sealing arrangement will result in

several threads of the cable gland being visible. The gland should be torqued between 15 to 20

N m (11 to 15 lb ft).

Note – The IP seal washer only applies to metric threads.

3.7.2 Electrical

Notes

It is advisable to check the detection locations, prior to fabrication of the mounting supports, as

changes are frequently made during construction at site. Detector cabling must be segregated

from cables carrying high-speed data or high energy and/or high frequency signals and other

forms electrical interference. The detector requires a clear unobstructed view of the local

hazard. To avoid local obstructions, such as pipework and cable trays, a 2m helix should be

allowed in the detector cabling. The detector should only be fitted just prior to commissioning

the detector. Experience shows that the detector can be damaged due to cable testing

operations (Insulation Tests, etc.).

Isolate all associated power supplies. Ensure that they remain OFF until required for

commissioning.

The threaded flame path of the enclosure cover and body must be protected from damage

during installation. Any such damage can destroy the validity of the enclosure.

The electronics subassembly shall be protected from mechanical damage and external sources

of EMI such as X-rays, RFI and electrostatic discharge.

4 The enclosures external earth stud should be connected to a local earth point.

Remove the transit plug(s) from the enclosure body gland entries.

Fit approved cable glands.

4 System Design Guidelines

The following guidelines are intended to assist with the electrical design and engineering of systems where it is

intended that flame detectors will be used.

4.1 Power Supply

The detector requires an absolute minimum supply voltage of 18Vdc, as measured at the detector terminals. The

system power supply voltage and power distribution should be arranged such that on the longest cable run the

detector(s) has a supply voltage of greater than 18Vdc.

4.2 Cable Selection

Cable to be used for installation is to be selected with a temperature rating of greater than 25 degrees Celsius

above the maximum ambient temperature.

The metric cable entries are fitted with an internal stop. This internal stop has an IP washer mounted directly

above it. Ensure this is fitted to maintain the ingress protection. This will result in threads of the cable gland being

visible. Do not over tighten.

The installation and local regulations and standards determine the overall cable specification. This section

specifies suitable cable characteristics to ensure correct operation of the flame detector.

4.3 DC Power

NOTE: Table 2 shows an absolute maximum for cable length; try not to approach this value.

DO NOT ground any cable shields at the detector housing.

Table 2: Maximum Cable Lengths (24Vdc supply)

Installation based

on 24V nominal

supply

Number of Flame

Detectors

Maximum Power

(W)

Maximum Cable

Length (m) with

1.5mm2 Conductors

(12Ω/km)

Maximum Cable

Length (m)with

2.5mm2 Conductors

(7.6Ω/km)

Heater on

12W @ 24Vdc

500

780

Heater off

3W @ 24Vdc

2000

3000

Table 3: AWG Conversions

Cross Sectional Area (mm

)

American Wire Gauge (AWG)

Typical Conductor Resistance per km

(3280 ft.)

DC Ω/km @ 20°C (Approx.)

0.5

1.0

1.5

2.5

7.6

5 Application Guidelines

In considering the application of the detector it is important to know of any conditions that may prevent the

detector from responding. The detector provides reliable response to hydrocarbon flames within its field of view,

and insensitivity to common false alarm sources. Solid obstructions or a direct view of intense light sources may

result in a reduction in the coverage and/or a reduction in the detector sensitivity. Scaffolding or tarpaulins in the

detector’s field of view may reduce coverage. Contamination of the detector window may result in a reduction in

sensitivity.

The detector has a 90° conical field of view. The location and orientation of the detector in relation to the

protected area determines the actual footprint. Achieving the desired coverage depends on congestion within

the protected space, the location of the detector(s) and the distance of the detector from the hazard. It may be

necessary to install more than one detector within an area to achieve adequate coverage.

The detector sensitivity, expressed as fire size at a distance, is determined by the radiant heat output of the fire.

This is a function of the fuel source, how it is released and distance from the detector to the fire.

In common with other forms of flame detection the detector’s sensitivity is reduced and potentially blinded by

dense obscurants such as smoke, fog, and other airborne particulates. The detector is insensitive to arc welding;

however, this should not be conducted within 10m of the detector.

5.1 Positioning Requirements

The following guidelines have been based on operational feedback, reflecting commonly experienced problems

which can be traced to a failure to observe the following:

• Ensure the mounting position is free from vibration or movement.

• Prevent accidental knocking or forcing out of alignment.

• Isolate as far as possible from local electrical interference sources.

• Ensure sufficient detection to achieve adequate coverage for all likely hazards.

• Minimise exposure to contamination of the detector face plate.

• Ensure ease of maintenance access to detector (i.e., direct ladder or scaffold access).

• Do not allow the FGard IR3 to have direct view of hot surfaces.

• Ensure that the FGard IR3 has no direct view or reflected view of a friendly fire.

• The detector should be aimed downward by at least 10° to 20°.

All these issues are of crucial importance to a successful installation and they should be afforded great attention

during the detailed design, construction, and commissioning phases of the work.

5.2 Detection Coverage

Detector locations can be chosen from computer models or from site surveys. The detectors should be aligned

to view the intended hazard considering any obstruction and congestion. Software analysis of the actual detector

coverage may be required to ensure adequate coverage of the hazards. This analysis can also be used to

optimise the number of detectors and the loop configuration. The cones of vision are detailed in Appendix C.

5.3 Exposure to Flare Radiation

Flame detectors are frequently used where hydrocarbon fire hazards are expected; these are quite often

processing plants where a flare stack is in use nearby. The detector shall not have a direct view of the flare or a

reflected view of the flare.

5.4 Optical Contamination

There are many sources of contamination such as oil, water (deluge water, rain, and sea-spray), snow, ice, and

internal misting. Excessive contamination of the detector faceplate may result in an increased maintenance

requirement and potentially reduce the detector’s sensitivity. Where detectors are mounted at low level, care

should be taken to avoid contamination (such as water and oil) from equipment above the detector. Care should

be taken in sighting the detector to minimise the likelihood of such contamination. The detector is designed such

that an optical fault is generated when half of the detection range remains. This is indicated by the fault output

and is evident by the yellow colour of the LED on the face of the detector. The optical fault condition indicates

that the detector requires cleaning or service. The optical fault indication is self-clearing.

5.5 Enclosed Areas

In enclosed areas, if dense smoke is expected to accumulate at the onset of the fire, the detector should be

mounted 1 to 2 metres below the ceiling level.

5.6 Detector Sensitivity

The detector’s response to a fire is a function of the fuel source and how it is released, fire size and distance,

orientation to the detector and local ambient conditions. The typical figures are based on in-house tests except

when marked with the FM logo, these tests were conducted and certified by Factory Mutual. As with all tests

the results must be interpreted according to the individual application considering all possible variables.

The detector sensitivity to different fuel sources is dependent on the radiant heat output of the flame and the

detectors typical response is shown below (see table 4). The detector will only detect hydrocarbon fires.

5.7 Detector Alarm Delay

The Detector can be factory configured with an Aux alarm delay (20mA) of between 0 and 10 seconds in 1

second steps over and above the normal response times of the 18mA alarm signal. If the Aux alarm signal is

delayed the 18mA alarm signal will precede the 20mA signal giving the normal response times as tested by

Factory Mutual to FM3260. The 20mA alarm signal if delayed is considered an Aux alarm level.

Table 4: Typical FGard IR3 Response Characteristics High sensitivity (60 metres). For all FM

approved results see Appendix D

Fuel

Fire Size

Distance

Methane Fire

0.6m plume height

50m (165 feet)

Ethanol Fire 0.3m x 0.3m pan 42m (136 feet)

Diesel Fire

0.3m x 0.3m pan

50m (165 feet)

Crude Oil (heavy fuel oil) Fire

0.3m x 0.3m pan

50m (165 feet)

Wax Inhibitor (Clear 10) Fire 0.3m x 0.3m pan 50m (165 feet)

Anti-Foam (Surflo AF-300) Fire

0.3m x 0.3m pan

50m (165 feet)

Wood Stack Fire 0.3m x 0.3m crib 50m (165 feet)

n-heptane Fire

0.3m x 0.3m pan

60m (200 feet)

n-heptane Fire in direct sunlight

0.3m x 0.3m pan

60m (200 feet)

n-heptane Fire in modulated sunlight 0.3m x 0.3m pan 60m (200 feet)

n-heptane Fire in the presence of Arc welding

0.3m x 0.3m pan

60m (200 feet)

n-heptane Fire in the presence of a 500-Watt lamp 0.3m x 0.3m pan 60m (200 feet)

Gasoline Fire

0.3m x 0.3m pan

60m (200 feet)

JP4 Fire

0.3m x 0.3m pan

60m (200 feet)

Methanol Fire 0.3m x 0.3m pan 42m (136 feet)

Jet A-1 Fire

0.3m x 0.3m pan

35m (115 feet)

6 Maintenance and Commissioning

6.1 Procedure

This maintenance schedule/ commissioning procedure is intended for guidance only. The actual level of

maintenance required will depend on the severity of the operating environment and the likelihood of damage or

the rate of contamination from oil, sea spray, deluge system etc. It is advisable to regularly review maintenance

reports and adapt the maintenance period to the operating environment.

Step

Periodic Inspection and Maintenance

Suggested Interval

1 - 6

General Inspection and maintenance of the detector and faceplate.

6 Monthly

6 - 14

Specific inspection and maintenance of the detector enclosure.

12 Monthly

Detector function testing.

6 Monthly

1 – 5

15 - 17

Commissioning Procedure. Post Installation

Step Activity Key Points

Detectors that require maintenance / commissioning should be taken

offline and inhibited. Detectors which require to be opened will need

to be isolated electrically.

Ensure that panel wiring,

and terminations

associated with all units

under test are in good

order.

Ensure that the detector mounting arrangements are secure and

undamaged.

Ensure that the detector enclosure is intact and undamaged.

Ensure that all associated cables and glands are correctly made up,

secure and undamaged.

Clean the enclosure faceplate (outside) with a mild detergent solution

and a soft cloth until the window is clear of all contamination. Wash

the window thoroughly with clean water and dry with a clean lint free

cloth or tissue.

Note: This MUST be carried out prior to initial powering of

the device. The FGard IR3 will carry out an automatic

Optical Test Calibration at this point.

Assess requirement for

opening the enclosure,

for maintenance or

cleaning, follow steps 6

to 14.

Open the detector enclosure if required, by removing the enclosure

cover. This exposes the enclosure flame path and detector lens.

Avoid damage to the

flame path, faceplate,

and lens.

Clean the enclosure cover and body flame paths with a dry clean

cloth to remove and contamination. If the flame path or threads are

badly pitted the components should be replaced.

Check the ‘O’ ring seal on the enclosure cover is not damaged or

perished, replace as required. Note the ingress protection is

compromised if the seal is not correct.

Clean the enclosure faceplate (inside) with a mild detergent solution

and a soft cloth until the window is clear of all contamination. Wash

the window thoroughly with clean water and dry with a clean lint free

cloth or tissue.

Non–setting waterproof grease should be evenly applied to the flame

path on both the enclosure cover and body.

Clean the detector lens. This should be done with a soft, dry, and

clean cloth.

Avoid touching the

optics or electronics.

Clean the detector enclosure faceplate. Use a degreasing agent on

the outside to remove deposits.

The enclosure cover must be screwed on to a minimum of 5 full turns

or until fully tight and secured using the locking screw provided.

Reinstate the detector back into service.

Page is loading ...

Crowcon FGard IR3 Flame Detector User manual

Crowcon FGard IR3 Flame Detector User manual

Crowcon FGard IR3 Flame Detector User manual

Related papers

Other documents